package com.lml.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * @author luomingliang
 * @date 2020/5/7 14:48
 */
@Service
public class PaymentService {

    //======================================服务降级=======================================
    public String paymentInfo_OK(Integer id){
        return "线程池: "+Thread.currentThread().getName()+" paymentInfo_OK, id: "+id+"\t"+"O(∩_∩)O哈哈~";
    }

    @HystrixCommand(
            fallbackMethod = "paymentInfo_TimeOutHandler",
            commandProperties = {
                    @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
            }
    )
    public String paymentInfo_TimeOut(Integer id){
        //int a = 10/0;
        int timeNum = 3000;
        try { TimeUnit.MILLISECONDS.sleep(timeNum); } catch (InterruptedException e) { e.printStackTrace(); }
        return "线程池: "+Thread.currentThread().getName()+" paymentInfo_TimeOut, id: "+id+"\t"+"耗时"+timeNum+"毫秒";
    }

    public String paymentInfo_TimeOutHandler(Integer id){
        return "线程池: "+Thread.currentThread().getName()+" 系统繁忙或运行报错,请稍后再试, id: "+id+"\t"+"o(╥﹏╥)o";
    }


    //======================================服务熔断=======================================
    @HystrixCommand(
            fallbackMethod = "paymentCircuitBreaker_fallback",
            commandProperties = {
                    @HystrixProperty(name = "circuitBreaker.enabled", value = "true"), //是否开启断路器
                    @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"), //请求次数
                    @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), //时间窗口期
                    @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60") //失败率达到多少后跳闸
            }
    )
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if (id < 0) {
            throw new RuntimeException("****id 不能为负数!!");
        }
        String serialNum = IdUtil.simpleUUID();
        return Thread.currentThread().getName()+"\t"+"调用成功,流水号:"+serialNum;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return "id 不能为负数, 请稍后再试, - -! id:"+id;
    }


}
